Newtown Castlebyrn
Townland in the civil parish of Monkstown, barony of Rathdown, Co. Dublin; in Irish Caisleán Uí Bhroin
- Area
- 37.1 ha
- 92 acres
- Land parcels
- 597
- registered freehold, median 236 m²
- Zoning
- R2
- Objective A
- Planning
- 100
- applications since 2010
Land parcels
Registered freehold land, Tailte Éireann
597 registered freehold parcels lie mostly in Newtown Castlebyrn, from 3 m² to 13,362 m² (1.34 ha, 3.3 acres). The dashed line is the townland's boundary; 21 neighbouring parcels touch it.
Zoning
Development plans, national zoning
- R2Objective A (Existing residential)
COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 463 parcels The zoning objective in the plan - G1Objective F (Open space, park)
COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 6 parcels The zoning objective in the plan - S5Objective SNI (Mixed/general community services/facilities uses)
COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 1 parcels The zoning objective in the plan
Source: Tailte Éireann and the Department of Housing (MyPlan), national zoning, CC BY 4.0.
Planning applications
Sites that touch the townland, newest first
3 Sept 2026Assessment period
Alterations and extension to existing dwelling, comprising of alterations to fr
Permission · Dun Laoghaire Rathdown County Council, D26A/0663/WEB
28 Aug 2026Declare application invalid
Alterations and extension to existing dwelling, comprising of alterations to fr
Permission · Dun Laoghaire Rathdown County Council, D26A/0645/WEB
28 Jul 2026Assessment period
• Demolition of the roof of the existing extension to the side;• Construction of
Permission · Dun Laoghaire Rathdown County Council, D26B/0430/WEB
9 Apr 2026Grant permission
Retention Planning Permission for single storey detached garden room/gym/office
Permission · Dun Laoghaire Rathdown County Council, D26B/0213/WEB
23 Mar 2026Grant permission
The construction of a new first floor extension over existing ground floor util
Permission · Dun Laoghaire Rathdown County Council, D26B/0165/WEB
17 Feb 2026Grant permission
Permission is sought for the construction of a single and two storey rear extens
Permission · Dun Laoghaire Rathdown County Council, D26B/0094/WEB
7 Dec 2025Grant permission
Alterations and additions to the existing semi-detached house; including for the
Permission · Dun Laoghaire Rathdown County Council, D25B/0681/WEB
28 Nov 2025Grant permission
a) Extension of the existing roof to form new dormer style window extensions to
Permission · Dun Laoghaire Rathdown County Council, D25B/0665
26 Nov 2025Grant permission & grant retention
The construction of a first-floor extension to the side of the existing dwelling
Permission for retention · Dun Laoghaire Rathdown County Council, D25B/0664/WEB
6 Oct 2025Grant permission for retention
Retention permission to widen the driveway (3.195M) and the relocation of the dr
Permission for retention · Dun Laoghaire Rathdown County Council, D25A/0756
30 Sept 2025S5 dec exempt
Works consist of proposed single story 22.4m2 living and dining extension to rea
Section 5 · Dun Laoghaire Rathdown County Council, REF16125
30 Sept 2025Declare application invalid
Retention Permission for the relocation of a means of access to the public road.
Permission for retention · Dun Laoghaire Rathdown County Council, D25A/0746
20 Aug 2025Grant permission
A 28sqm. ground floor single story extension to the side of end terrace dwellin
Permission · Dun Laoghaire Rathdown County Council, D25B/0466/WEB
31 May 2025Grant permission
The construction of a new ground and first floor extension to the rear and the
Permission · Dun Laoghaire Rathdown County Council, D25B/0306/WEB
2 May 2025Grant permission
Installation of a 4.37m x 1.1m x 2.69m (LxWxH) above ground enclosure, to house
Permission · Dun Laoghaire Rathdown County Council, D25A/0357/WEB
23 Apr 2025Grant permission
Planning permission to overclad existing brick facade to front, rough cast pebbl
Permission · Dun Laoghaire Rathdown County Council, D25B/0221
3 Apr 2025Grant permission
(a) demolition of single storey attached garage to side (west) and rear, (b) con
Permission · Dun Laoghaire Rathdown County Council, D25A/0271/WEB
18 Feb 2025Grant permission
Demolition of existing detached garage and construction of a single storey exten
Permission · Dun Laoghaire Rathdown County Council, D25B/0082/WEB
26 Nov 2024Grant permission for retention
The development consists of: - Alterations to previously granted drawings as per
Permission for retention · Dun Laoghaire Rathdown County Council, D24A/0936/WEB
8 Nov 2024Grant permission
The demolition of the existing garage and construction of a two storey extensio
Permission · Dun Laoghaire Rathdown County Council, D24A/0895/WEB
11 Sept 2024Declare application invalid
The development consists of: - Alterations to previously granted drawings as per
Permission for retention · Dun Laoghaire Rathdown County Council, D24A/0713/WEB
5 Aug 2024Declare invalid (site notice)
The Development consists of: - Alterations to previously granted drawings as per
Permission for retention · Dun Laoghaire Rathdown County Council, D24A/0598/WEB
26 Jul 2024Grant permission
Permission for reconfiguring the layout of the ground and first floor
Permission · Dun Laoghaire Rathdown County Council, D24B/0340
4 Jul 2024Grant permission
The construction of a two storey extension to the side & rear of existing detach
Permission · Dun Laoghaire Rathdown County Council, D24B/0301/WEB
28 Jun 2024Declare application invalid
the construction of a two storey extension to the side & rear of existing detach
Permission · Dun Laoghaire Rathdown County Council, D24B/0294/WEB
The 25 most recent of over 100 applications.
Source: National Planning Applications, Department of Housing, Local Government and Heritage, CC BY 4.0. Applicants are not shown.
Nature and heritage
Designated sites and recorded monuments
Designated sites
No designated site (Special Area of Conservation, Special Protection Area, Natural Heritage Area or proposed one) touches the townland of Newtown Castlebyrn.
Recorded monuments
No recorded monument lies in the townland of Newtown Castlebyrn.
Designated sites: National Parks and Wildlife Service. Recorded monuments: Sites and Monuments Record, National Monuments Service. Department of Housing, Local Government and Heritage, CC BY 4.0. Works at or in relation to a recorded monument need two months' written notice to the National Monuments Service (National Monuments (Amendment) Act 1994, section 12).
Homes sold
Property Price Register
No address of the register names Newtown Castlebyrn with five sales or more. The sales of the area are on the page of Co. Dublin.
The townland
- Name
- Newtown Castlebyrn · Caisleán Uí Bhroin
- Area
- 370,634 m² (37.06 ha, 91.59 acres)
- Civil parish
- Monkstown, and its townlands
- Barony
- Rathdown
- Electoral division
- Blackrock-Newpark, the unit of the census
- Neighbouring townlands
- Kill Of The Grange, Lansville, Mountashton, Newtownpark, Rockfield, Stillorgan Park, Stradbrook
- Placenames
- Newtown Castlebyrn on logainm.ie, the Placenames Database of Ireland
Townlands, civil parishes, baronies and electoral divisions, National Statutory Boundaries, Tailte Éireann, CC BY 4.0. A townland is the smallest land division of Ireland, and the unit of a rural address; old registers such as the 1901 and 1911 censuses file it under its civil parish and barony.